利用机器学习技术从CT图像中提取混合特征对肾脏病变进行分类

Classification of Renal Lesions by Leveraging Hybrid Features from CT Images Using Machine Learning Techniques.

作者信息

Kaur Ravinder, Khattar Sonam, Singla Sanjay

机构信息

Thapar Institute of Engineering and Technology, Patiala, Punjab, India.

Department of Computer Science, Chandigarh University, Gharuan, Mohali, Punjab, India.

出版信息

J Imaging Inform Med. 2025 Jul 14. doi: 10.1007/s10278-025-01596-2.

Abstract

Renal cancer is amid the several reasons of increasing mortality rates globally, which can be reduced by early detection and diagnosis. The classification of lesions is based mostly on their characteristics, which include varied shape and texture properties. Computed tomography (CT) imaging is a regularly used imaging modality for study of the renal soft tissues. Furthermore, a radiologist's ability to assess a corpus of CT images is limited, which can lead to misdiagnosis of kidney lesions, which might lead to cancer progression or unnecessary chemotherapy. To address these challenges, this study presents a machine learning technique based on a novel feature vector for the automated classification of renal lesions using a multi-model texture-based feature extraction. The proposed feature vector could serve as an integral component in improving the accuracy of a computer aided diagnosis (CAD) system for identifying the texture of renal lesion and can assist physicians in order to provide more precise lesion interpretation. In this work, the authors employed different texture models for the analysis of CT scans, in order to classify benign and malignant kidney lesions. Texture analysis is performed using features such as first-order statistics (FoS), spatial gray level co-occurrence matrix (SGLCM), Fourier power spectrum (FPS), statistical feature matrix (SFM), Law's texture energy measures (TEM), gray level difference statistics (GLDS), fractal, and neighborhood gray tone difference matrix (NGTDM). Multiple texture models were utilized to quantify the renal texture patterns, which used image texture analysis on a selected region of interest (ROI) from the renal lesions. In addition, dimensionality reduction is employed to discover the most discriminative features for categorization of benign and malignant lesions, and a unique feature vector based on correlation-based feature selection, information gain, and gain ratio is proposed. Different machine learning-based classifiers were employed to test the performance of the proposed features, out of which the random forest (RF) model outperforms all other techniques to distinguish benign from malignant tumors in terms of distinct performance evaluation metrics. The final feature set is evaluated using various machine learning classifiers, with the RF model achieving the highest performance. The proposed system is validated on a dataset of 50 subjects, achieving a classification accuracy of 95.8%, outperforming other conventional models.

摘要

肾癌是全球死亡率上升的几个原因之一,早期检测和诊断可以降低死亡率。病变的分类主要基于其特征,包括形状和纹理特性的多样性。计算机断层扫描(CT)成像是研究肾脏软组织常用的成像方式。此外,放射科医生评估一系列CT图像的能力有限,这可能导致肾脏病变的误诊,进而可能导致癌症进展或不必要的化疗。为应对这些挑战,本研究提出了一种基于新型特征向量的机器学习技术,用于使用基于多模型纹理的特征提取对肾脏病变进行自动分类。所提出的特征向量可以作为提高计算机辅助诊断(CAD)系统识别肾脏病变纹理准确性的一个组成部分,并可以帮助医生提供更精确的病变解释。在这项工作中,作者采用不同的纹理模型来分析CT扫描,以对良性和恶性肾脏病变进行分类。纹理分析使用诸如一阶统计量(FoS)、空间灰度共生矩阵(SGLCM)、傅里叶功率谱(FPS)、统计特征矩阵(SFM)、劳氏纹理能量度量(TEM)、灰度差统计量(GLDS)、分形以及邻域灰度色调差矩阵(NGTDM)等特征。利用多个纹理模型来量化肾脏纹理模式,对从肾脏病变中选定的感兴趣区域(ROI)进行图像纹理分析。此外,采用降维来发现对良性和恶性病变分类最具判别力的特征,并提出了一种基于基于相关性的特征选择、信息增益和增益比的独特特征向量。采用不同的基于机器学习的分类器来测试所提出特征的性能,其中随机森林(RF)模型在不同的性能评估指标方面在区分良性和恶性肿瘤方面优于所有其他技术。使用各种机器学习分类器对最终特征集进行评估,RF模型实现了最高性能。所提出的系统在一个包含50名受试者的数据集上得到验证,分类准确率达到95.8%,优于其他传统模型。

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